Re: sonypi kernel driver -- volunteers needed

On 07/24/03 17:23, Ignacy Gawedzki typed onto the keyboard:
> On Thu, Jul 24, 2003 at 07:54:19AM -0700, thus spake Vance Lankhaar:
> 
>>On Thu, 2003-07-24 at 04:49, Daniel K. wrote:
>>
>>
>>>e.g. the "keep LCD brightness setting over reeboot" feature you know 
>>>from Windows.
>>
>>That shouldn't be too hard to do... It doesn't sound like a driver
>>issue, though. It sounds like you need to write yourself a little
>>script. Just write a wrapper for spicctrl that records the brightness
>>level in a file somewhere, be sure to always use the wrapper, and then
>>have a startup script that reads that file and sets the brightness.
> 
> 
> That would be a solution, but I think what Windows do is writing it
> somewhere in NVRAM for the BIOS to check at boot (at least in my Z1A).
> For example, If you set the brightness to minimum under Windows, then
> halt and start the computer again, the brightness is set by the BIOS to
> the minimum at the very beginning.

This is exactly what I mean. To get this to work we probably have to 
disassemble the Windows driver to see what it does.

> 
> I tried to compare the data from /dev/nvram in the two states, and
> indeed there is a difference.  But /dev/nvram doesn't seem to reach all
> the BIOS configuration data, since writing one of the saved data back
> into /dev/nvram, somehow disabled the boot animation and set the sound
> volume back to factory default (in addition to changing the default
> brightness).

Thanks for the clues, I havent really had time to look into any of this yet.

> 
> Has anyone else fiddled with the BIOS configuration data?
> 

Daniel K.